WO2022210130A1 - Film capacitor, coupling capacitor, inverter, and electric vehicle - Google Patents

Film capacitor, coupling capacitor, inverter, and electric vehicle Download PDF

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Publication number
WO2022210130A1
WO2022210130A1 PCT/JP2022/013293 JP2022013293W WO2022210130A1 WO 2022210130 A1 WO2022210130 A1 WO 2022210130A1 JP 2022013293 W JP2022013293 W JP 2022013293W WO 2022210130 A1 WO2022210130 A1 WO 2022210130A1
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metal layer
film
electrode
strip
capacitor
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PCT/JP2022/013293
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French (fr)
Japanese (ja)
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耕世 神垣
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京セラ株式会社
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Publication of WO2022210130A1 publication Critical patent/WO2022210130A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G4/00—Fixed capacitors; Processes of their manufacture
    • H01G4/32—Wound capacitors

Definitions

  • the present disclosure relates to film capacitors, coupled capacitors, inverters, and electric vehicles.
  • Patent Document 1 An example of conventional technology is described in Patent Document 1.
  • a first metal layer is provided on one surface, and second metal layers orthogonal to the first direction are provided on a first edge and a second edge in a first direction of the one surface.
  • a first dielectric film provided with a first common metal layer and a second common metal layer which are continuous in a direction, and a second metal layer provided on one surface and a first edge in the first direction on the one surface. and a second dielectric film provided with an edge insulating region continuous in the second direction orthogonal to the first direction at the second edge and the edge insulating region at the position in plan view of the edge insulating region.
  • the first metal layer is electrically connected to the It includes a first metal electrode and a second metal electrode that are connected.
  • the first metal layer electrically connected to the first metal electrode and the second metal electrode extends in the first direction to electrically connect the first common metal layer and the second common metal layer, respectively.
  • first strip-shaped metal layers and second strip-shaped metal layers that are symmetrically connected, wherein the second metal layers extend in the first direction to extend the first common metal layer and the second common metal layer; and a first electrode film and a second electrode film that are not electrically connected to each other, the first strip-shaped metal layer and the first electrode film are overlapped with each other when viewed through a plane, and the second strip-shaped metal layer and the second electrode film are overlapped with each other. It is arranged so that the two electrode films overlap, The second strip-shaped metal layer is thicker than the first strip-shaped metal layer, and the first electrode film is thinner than the second electrode film.
  • a coupled capacitor of the present disclosure is a coupled capacitor including a plurality of film capacitors and a bus bar connecting the plurality of film capacitors, wherein the film capacitor is any one of the film capacitors described above. is.
  • An inverter of the present disclosure is an inverter including a bridge circuit configured by switching elements and a capacitor connected to the bridge circuit, wherein the capacitor is any one of the film capacitors described above. .
  • An electric vehicle of the present disclosure includes a power supply, the inverter connected to the power supply, a motor connected to the inverter, and wheels driven by the motor.
  • FIG. 1 is a diagram showing the structure of a film capacitor according to a first embodiment, and is a plan view of a dielectric film
  • FIG. 1 is a diagram showing the structure of a film capacitor according to a first embodiment, and is a plan view of a dielectric film
  • FIG. 1 is a diagram showing the structure of a film capacitor according to a first embodiment, and is a schematic cross-sectional view showing a laminated state of dielectric films.
  • FIG. 2 is an enlarged cross-sectional view showing a laminated structure of dielectric films and electrode films
  • FIG. FIG. 10 is a diagram showing the configuration of a film capacitor according to a second embodiment, and is a plan view of a dielectric film;
  • FIG. 10 is a diagram showing the configuration of a film capacitor according to a second embodiment, and is a plan view of a dielectric film; It is a figure which shows the structure of the film capacitor of 2nd Embodiment, and is a cross-sectional schematic diagram which shows the laminated state of a dielectric film.
  • 2 is an enlarged cross-sectional view showing a laminated structure of dielectric films and electrode films;
  • FIG. It is the perspective view which notched one part which shows the modification of a film capacitor.
  • 1 is a perspective view schematically showing the configuration of a coupled capacitor;
  • FIG. 3 is an electric circuit diagram for explaining the configuration of an inverter; 1 is a schematic configuration diagram for explaining the configuration of an electric vehicle;
  • a film capacitor having a configuration that forms the basis of the film capacitor of the present disclosure is roughly classified into one that uses a metal foil as an electrode and one that uses a vapor-deposited metal provided on a dielectric film as an electrode.
  • metallized film capacitors which use vapor-deposited metal as electrodes (hereinafter referred to as vapor-deposited electrodes) have a smaller electrode volume than metal foil capacitors, and can be made smaller and lighter. High reliability against dielectric breakdown due to its performance (when a short circuit occurs at an insulation defect, the energy of the short circuit evaporates and scatters the vapor-deposited electrode around the insulation defect, insulating it and restoring the function of the capacitor). Therefore, it has been widely used in the past.
  • the life under high temperature and high humidity conditions can be extended.
  • the self-recovery function of the battery may be degraded and a short failure may occur.
  • An object of the present disclosure is to provide a film capacitor capable of suppressing a decrease in life due to anodization of the electrode film and having stable self-recovery performance.
  • FIG. 1 is a diagram showing the configuration of a film capacitor 11 according to the first embodiment.
  • 1A and 1B are plan views of dielectric films 1 and 2
  • FIG. 1C is a schematic cross-sectional view showing a laminated state of dielectric films 1 and 2.
  • FIG. 2 is an enlarged sectional view showing a laminated structure of dielectric films 1 and 2 and metal layers 3A, 3B and 8.
  • a first metallikon 5A and a second metallikon 5B are formed on both end surfaces of a film laminate 4.
  • FIG. 1 is a diagram showing the configuration of a film capacitor 11 according to the first embodiment.
  • 1A and 1B are plan views of dielectric films 1 and 2
  • FIG. 1C is a schematic cross-sectional view showing a laminated state of dielectric films 1 and 2.
  • FIG. 2 is an enlarged sectional view showing a laminated structure of dielectric films 1 and 2 and metal layers 3A, 3B and 8.
  • the film laminate 4 includes a dielectric film (first dielectric film) 1 having first metal layers 3A and 3B on one surface of a base film as shown in FIG. 1A, and a base film as shown in FIG. A dielectric film (second dielectric film) 2 having a second metal layer 8 is alternately laminated on one surface.
  • the metallized film has dielectric films 1, 2 and first metal layers 3A, 3B and a second metal layer 8 formed on the upper surfaces of the dielectric films 1, 2 so as to leave an insulating margin.
  • Each insulation margin S extends in the length direction of each dielectric film 1,2 in the width direction of each dielectric film 1,2.
  • the film width direction of the dielectric films 1 and 2 (hereinafter simply referred to as the width direction) is the facing direction of the first metallikon 5A and the second metallikon 5B.
  • the dielectric films 1 and 2 the first metal layers 3A and 3B, and the second metal layer 8 that constitute the metallized film will be described in detail.
  • the dielectric films 1 and 2 are films connected to the first metallikon 5A and the second metallikon 5B, and are made of polypropylene, for example.
  • the thickness of the dielectric films 1 and 2 is, for example, 2.8 ⁇ m. Note that the material and thickness of the dielectric films 1 and 2 are not limited to these.
  • Aluminum for example, is used for the first metal layers 3A, 3B and the second metal layer 8.
  • the first metal layer 3A of the dielectric film 1 includes a first common metal layer 3Ac and a first strip-shaped metal layer 3Aa connected to the first common metal layer 3Ac.
  • the first metal layer 3B includes a second common metal layer 3Bc and a second strip-shaped metal layer 3Ba connected to the second common metal layer 3Bc.
  • the first strip-shaped metal layer 3Aa and the second strip-shaped metal layer 3Ba extend in the first direction.
  • the first common metal layer 3Ac and the second common metal layer 3Bc are provided extending in the second direction at the first edge and the second edge in the first direction of the dielectric film 1, respectively. .
  • the first common metal layer 3Ac is electrically connected to the first metallikon 5A
  • the second common metal layer 3Bc is electrically connected to the second metallikon 5B.
  • the film surface is exposed between the first strip-shaped metal layer 3Aa on the side of the first metallikon 5A and the second strip-shaped metal layer 3Ba on the side of the second metallikon 5B, and is electrically insulated. state.
  • This exposed film surface serves as a central insulating region Tc continuous along the second direction in the central portion of the dielectric film 1 in the first direction.
  • the second metal layer 8 of the dielectric film 2 is one planar metal layer of a so-called solid pattern. A first edge and a second edge in the first direction of the dielectric film 2 are provided with an edge insulation region T continuous in the second direction. Layer 8 is in a state of being electrically insulated from first metallikon 5A and second metallikon 5B.
  • the second metal layer 8 has a first electrode film 15 and a second electrode film 16 , and a connection layer 71 between the first electrode film 15 and the second electrode film 16 .
  • the first strip-shaped metal layer 3Aa and the second electrode film 16 are overlapped, and the second strip-shaped metal layer 3Ba and the first electrode film 15 are arranged so as to be overlapped.
  • the second strip-shaped metal layer 3Ba is thicker than the first electrode film 15.
  • the first electrode film 15 is thinner than the second electrode film 16 .
  • the first strip-shaped metal layer 3 ⁇ /b>Aa is thinner than the second strip-shaped metal layer 3 ⁇ /b>Ba and thinner than the second electrode film 16 .
  • the film laminate 4 is laminated such that the first strip-shaped metal layer 3Aa of the first metal layer 3A and the second electrode film 16 of the second metal layer 8 overlap in plan view, and the second electrode film 16 of the first metal layer 3B is laminated.
  • the two strip-shaped metal layers 3Ba and the first electrode film 15 of the second metal layer 8 are laminated so as to overlap each other.
  • the film capacitor 11 is a multilayer capacitor composed of the first common metal layer 3Ac, the first strip-shaped metal layer 3Aa on the first metallikon 5A side, and the second electrode film 16, and the second common metal layer 3Bc on the second metallikon 5B side.
  • the second strip-shaped metal layer 3Ba and the multilayer capacitor formed of the first electrode film 15 are connected in series by the second metal layer 8. As shown in FIG.
  • the film capacitor 11 of this embodiment can achieve a high withstand voltage by using a series capacitor.
  • the plurality of first strip-shaped metal layers 3Aa, the second strip-shaped metal layers 3Ba, and the second metal layer 8 overlap in plan view
  • the second metal layer 8 is the first common metal layer. It does not overlap with 3Ac and the second common metal layer 3Bc.
  • the second metal layer 8 may include a plurality of planar metal layers as long as each planar metal layer overlaps the first strip-shaped metal layer 3Aa and the second strip-shaped metal layer 3Ba in plan view. .
  • the electrode film at the fracture site can be scattered by a transient large current when the fracture occurs. This provides self-healing properties.
  • FIG. 3A and 3B are plan views of the dielectric films 1 and 2
  • FIG. 3C is a schematic cross-sectional view showing the laminated state of the dielectric films 1 and 2.
  • FIG. 4 is an enlarged sectional view showing a laminate structure of dielectric films 1 and 2 and metal layers 3A, 3B and 8. As shown in FIG. Descriptions of portions that overlap with the description of the first embodiment are omitted, and the same reference numerals are used.
  • the first strip-shaped metal layer 3Aa which is thinner than the second strip-shaped metal layer 3Ba, is divided into two or more and connected by a fuse 67, and the first strip-shaped metal layer 3Aa thinner than the second electrode film 16 is connected.
  • the electrode film 15 is connected by a fuse 68 while being divided into two or more.
  • the fuse 67 is provided in the thin first strip-shaped metal layer 3Aa of the facing first strip-shaped metal layer 3Aa and the second electrode film 16, and the fuse 68 is provided in the opposing second strip-shaped metal layer 3Aa. It is provided on the thin first electrode film 15 of the strip-like metal layer 3Ba and the first electrode film 15. As shown in FIG. As a result, even if the self-healing property of the metal film is insufficient, the fuse can be blown to separate the broken portion.
  • each small cell The area obtained by multiplying the sum of the areas of 3Aa1 and 3Aa2 by the number of the first strip-shaped metal layers 3Aa formed on each dielectric film 1, and the area of the small cells 151 and 152 formed on each dielectric film 2 equal to the sum of
  • the film capacitor 61 of this embodiment is a series capacitor like the film capacitor 11 described above. By setting the area of each small cell as described above, the capacity of the two capacitors connected in series becomes equal. In series capacitors, the voltage across the capacitors connected in series depends on the capacitance ratio of each cell. When two capacitors connected in series have the same capacitance as in this embodiment, when a voltage V is applied, the voltage applied to each capacitor is equal (1/2)V. If the two capacitors connected in series have different capacities, the load on one of the capacitors increases, shortening the life of the capacitor. If one of the series capacitors breaks down, the load on the remaining capacitors increases, and the breakdown progresses in an avalanche fashion, resulting in short-lived capacitors.
  • the film capacitor 61 of this embodiment can equalize the load applied to the two capacitors that make up the series capacitor, and realize a long-life, highly reliable, and high withstand voltage capacitor.
  • FIG. 5 is a partially cutaway perspective view showing a modification of the film capacitor.
  • the film capacitor A is obtained by covering a film capacitor 11 with an exterior member 7 in terms of insulation and environmental resistance. Lead wires 6 for external connection are provided to the first metallikon 5A and the second metallikon 5B.
  • FIG. 5 shows a state in which a part of the exterior member 7 is removed, and the removed portion of the exterior member 7 is indicated by a broken line.
  • FIG. 6 is a perspective view schematically showing the configuration of a coupled capacitor.
  • the coupled capacitor B has a configuration in which a plurality of film capacitors A are connected in parallel by a pair of bus bars 21 and 23 .
  • the busbars 21 and 23 are composed of terminal portions 21a and 23a and lead terminal portions 21b and 23b.
  • the terminal portions 21a and 23a are for external connection, and the lead terminal portions 21b and 23b are connected to the first metallikon 5A and the second metallikon 5B, which are the external electrodes of the film capacitor A, respectively.
  • FIG. 7 is an electric circuit diagram for explaining the configuration of the inverter.
  • FIG. 7 shows an example of an inverter C that generates alternating current from rectified direct current.
  • the inverter C of this embodiment includes a bridge circuit 31 and a capacitor section 33, as shown in FIG.
  • the bridge circuit 31 is composed of, for example, switching elements such as IGBTs (Insulated Gate Bipolar Transistors) and diodes.
  • the capacitive section 33 is arranged between the input terminals of the bridge circuit 31 and stabilizes the voltage.
  • the inverter C may include the film capacitors 11 and A or the coupled capacitor B as the capacitive section 33 .
  • the input of this inverter C may be connected to the booster circuit 35 for boosting the voltage of the DC power supply or may be connected to the DC power supply.
  • the bridge circuit 31 is connected to a motor generator (motor M) as a drive source.
  • FIG. 8 is a schematic configuration diagram for explaining the configuration of the electric vehicle.
  • FIG. 8 shows an example of a hybrid electric vehicle (HEV) as the electric vehicle D. As shown in FIG.
  • HEV hybrid electric vehicle
  • An electric vehicle D in FIG. 8 includes a driving motor 41, an engine 43, a transmission 45, an inverter 47, a power supply (battery) 49, front wheels 51a and rear wheels 51b.
  • This electric vehicle D has a motor 41, an engine 43, or both as a drive source.
  • the output of the drive source is transmitted via the transmission 45 to the pair of left and right front wheels 51a.
  • the power supply 49 is connected to the inverter 47 and the inverter 47 is connected to the motor 41 .
  • the electric vehicle D shown in FIG. 8 includes a vehicle ECU 53 and an engine ECU 57 .
  • the vehicle ECU 53 performs overall control of the electric vehicle D as a whole.
  • the engine ECU 57 drives the electric vehicle D by controlling the rotation speed of the engine 43 .
  • the electric vehicle D further includes driving devices such as an ignition key 55 operated by the driver or the like, an accelerator pedal (not shown), and a brake.
  • a vehicle ECU receives a driving signal according to the operation of the driving device by the driver or the like.
  • the vehicle ECU 53 outputs an instruction signal to the engine ECU 57, the power supply 49, and the inverter 47 as a load based on the drive signal.
  • the engine ECU 57 drives the electric vehicle E by controlling the rotation speed of the engine 43 in response to the instruction signal.
  • An inverter C using the film capacitors A and 10 or the coupled capacitor B of the present embodiment as the capacitance section 33 can be mounted on an electric vehicle D as shown in FIG.
  • the inverter C of this embodiment can be applied not only to the hybrid electric vehicle (HEV) described above, but also to various power conversion application products such as electric vehicles (EV) or electric bicycles, generators, and solar cells.
  • EV electric vehicles
  • EB electric bicycles, generators, and solar cells.
  • a first metal layer is provided on one surface, and second metal layers orthogonal to the first direction are provided on a first edge and a second edge in a first direction of the one surface.
  • a first dielectric film provided with a first common metal layer and a second common metal layer which are continuous in a direction, and a second metal layer provided on one surface and a first edge in the first direction on the one surface. and a second dielectric film provided with an edge insulating region continuous in the second direction orthogonal to the first direction at the second edge and the edge insulating region at the position in plan view of the edge insulating region.
  • the first metal layer is formed on each of a rectangular parallelepiped film laminate in which a plurality of sheets are laminated so that every other sheet overlaps, and a pair of end surfaces of the film laminate in the first direction, and the first metal layer is electrically connected to the It includes a first metal electrode and a second metal electrode that are connected.
  • the first metal layer electrically connected to the first metal electrode and the second metal electrode extends in the first direction to electrically connect the first common metal layer and the second common metal layer, respectively. It has a plurality of first strip-shaped metal layers and second strip-shaped metal layers that are statically connected.
  • the second metal layer has a first electrode film and a second electrode film that extend in the first direction and are not electrically connected to the first common metal layer and the second common metal layer.
  • the first strip-shaped metal layer and the first electrode film are arranged to overlap, and the second strip-shaped metal layer and the second electrode film are arranged to overlap.
  • the second strip-shaped metal layer is thicker than the first strip-shaped metal layer, and the first electrode film is thinner than the second electrode film.
  • a coupled capacitor of the present disclosure is a coupled capacitor including a plurality of film capacitors and a bus bar connecting the plurality of film capacitors, wherein the film capacitor is any one of the film capacitors described above. is.
  • An inverter of the present disclosure is an inverter including a bridge circuit configured by switching elements and a capacitor connected to the bridge circuit, wherein the capacitor is any one of the film capacitors described above. .
  • An electric vehicle of the present disclosure includes a power supply, the inverter connected to the power supply, a motor connected to the inverter, and wheels driven by the motor.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Fixed Capacitors And Capacitor Manufacturing Machines (AREA)

Abstract

The present invention is such that: a first metal layer electrically connected to a first metal electrode and a second metal electrode extends in a first direction and has a plurality of first band-like metal layers and second band-like metal layers electrically connected to a first common metal layer and a second common metal layer; a second metal layer extends in the first direction and has a first electrode film and a second electrode film that are not electrically connected to the common metal layers; the second band-like metal layers are thicker than the first band-like metal layers; the first electrode film is thinner than the second electrode film; and in a planar perspective, the first band-like metal layers and the second electrode film are disposed so as to overlap and the second band-like metal layers and the first electrode film are disposed so as to overlap.

Description

フィルムコンデンサ、連結型コンデンサ、インバータおよび電動車輌Film capacitors, coupled capacitors, inverters and electric vehicles
　本開示は、フィルムコンデンサ、連結型コンデンサ、インバータおよび電動車輌に関する。 The present disclosure relates to film capacitors, coupled capacitors, inverters, and electric vehicles.
　従来技術の一例は、特許文献１に記載されている。 An example of conventional technology is described in Patent Document 1.
特開２００４－９５６０４号公報JP-A-2004-95604
　本開示のフィルムコンデンサは、一面に第１金属層が配設され、該一面の第１の方向の第１の縁部および第２の縁部に、前記第１の方向に直交する第２の方向に連続する第１共通金属層および第２共通金属層がそれぞれ設けられた第１誘電体フィルムと、一面に第２金属層が配設され、該一面の第１の方向の第１の縁部および第２の縁部に、前記第１の方向に直交する前記第２の方向に連続する縁部絶縁領域が設けられた第２誘電体フィルムとが、前記縁部絶縁領域の平面視位置が１枚おきに重なるように複数枚積層された直方体状のフィルム積層体と、前記フィルム積層体の前記第１の方向の一対の端面のそれぞれに形成され、前記第１金属層に電気的に接続される第１金属電極および第２金属電極を含む。前記第１金属電極および前記第２金属電極に電気的に接続される前記第１金属層は、前記第１の方向に延びて、前記第１共通金属層および前記第２共通金属層にそれぞれ電気的に接続される複数の第１帯状金属層および第２帯状金属層を有し、前記第２金属層は、前記第１の方向に延びて前記第１共通金属層および前記第２共通金属層と電気的に接続されない第１電極膜と第２電極膜とを有し、平面透視して、前記第１帯状金属層と前記第１電極膜とが重なり、前記第２帯状金属層と前記第２電極膜とが重なるように配置されており、
前記第２帯状金属層は、前記第１帯状金属層よりも厚みが厚く、前記第１電極膜は、前記第２電極膜よりも厚みが薄い。 In the film capacitor of the present disclosure, a first metal layer is provided on one surface, and second metal layers orthogonal to the first direction are provided on a first edge and a second edge in a first direction of the one surface. A first dielectric film provided with a first common metal layer and a second common metal layer which are continuous in a direction, and a second metal layer provided on one surface and a first edge in the first direction on the one surface. and a second dielectric film provided with an edge insulating region continuous in the second direction orthogonal to the first direction at the second edge and the edge insulating region at the position in plan view of the edge insulating region. is formed on each of a rectangular parallelepiped film laminate in which a plurality of sheets are laminated so that every other sheet overlaps, and a pair of end surfaces of the film laminate in the first direction, and the first metal layer is electrically connected to the It includes a first metal electrode and a second metal electrode that are connected. The first metal layer electrically connected to the first metal electrode and the second metal electrode extends in the first direction to electrically connect the first common metal layer and the second common metal layer, respectively. a plurality of first strip-shaped metal layers and second strip-shaped metal layers that are symmetrically connected, wherein the second metal layers extend in the first direction to extend the first common metal layer and the second common metal layer; and a first electrode film and a second electrode film that are not electrically connected to each other, the first strip-shaped metal layer and the first electrode film are overlapped with each other when viewed through a plane, and the second strip-shaped metal layer and the second electrode film are overlapped with each other. It is arranged so that the two electrode films overlap,
The second strip-shaped metal layer is thicker than the first strip-shaped metal layer, and the first electrode film is thinner than the second electrode film.
　本開示の連結型コンデンサは、複数のフィルムコンデンサと、該複数のフィルムコンデンサを接続するバスバーと、を備えている連結型コンデンサであって、前記フィルムコンデンサが、上記のいずれかに記載のフィルムコンデンサである。 A coupled capacitor of the present disclosure is a coupled capacitor including a plurality of film capacitors and a bus bar connecting the plurality of film capacitors, wherein the film capacitor is any one of the film capacitors described above. is.
　本開示のインバータは、スイッチング素子により構成されるブリッジ回路と、該ブリッジ回路に接続された容量部とを備えているインバータであって、前記容量部が上記のいずれかに記載のフィルムコンデンサである。 An inverter of the present disclosure is an inverter including a bridge circuit configured by switching elements and a capacitor connected to the bridge circuit, wherein the capacitor is any one of the film capacitors described above. .
　本開示の電動車輌は、電源と、該電源に接続された上記インバータと、該インバータに接続されたモータと、該モータにより駆動する車輪と、を備えている。 An electric vehicle of the present disclosure includes a power supply, the inverter connected to the power supply, a motor connected to the inverter, and wheels driven by the motor.
第１実施形態のフィルムコンデンサの構成を示す図であり、誘電体フィルムの平面図である。1 is a diagram showing the structure of a film capacitor according to a first embodiment, and is a plan view of a dielectric film; FIG. 第１実施形態のフィルムコンデンサの構成を示す図であり、誘電体フィルムの平面図である。1 is a diagram showing the structure of a film capacitor according to a first embodiment, and is a plan view of a dielectric film; FIG. 第１実施形態のフィルムコンデンサの構成を示す図であり、誘電体フィルムの積層状態を示す断面模式図である。1 is a diagram showing the structure of a film capacitor according to a first embodiment, and is a schematic cross-sectional view showing a laminated state of dielectric films. FIG. 誘電体フィルムおよび電極膜の積層構造を示す拡大断面図である。2 is an enlarged cross-sectional view showing a laminated structure of dielectric films and electrode films; FIG. 第２実施形態のフィルムコンデンサの構成を示す図であり、誘電体フィルムの平面図である。FIG. 10 is a diagram showing the configuration of a film capacitor according to a second embodiment, and is a plan view of a dielectric film; 第２実施形態のフィルムコンデンサの構成を示す図であり、誘電体フィルムの平面図である。FIG. 10 is a diagram showing the configuration of a film capacitor according to a second embodiment, and is a plan view of a dielectric film; 第２実施形態のフィルムコンデンサの構成を示す図であり、誘電体フィルムの積層状態を示す断面模式図である。It is a figure which shows the structure of the film capacitor of 2nd Embodiment, and is a cross-sectional schematic diagram which shows the laminated state of a dielectric film. 誘電体フィルムおよび電極膜の積層構造を示す拡大断面図である。2 is an enlarged cross-sectional view showing a laminated structure of dielectric films and electrode films; FIG. フィルムコンデンサの変形例を示す、一部が切り欠かれた斜視図である。It is the perspective view which notched one part which shows the modification of a film capacitor. 連結型コンデンサの構成を模式的に示した斜視図である。1 is a perspective view schematically showing the configuration of a coupled capacitor; FIG. インバータの構成を説明するための電気回路図である。FIG. 3 is an electric circuit diagram for explaining the configuration of an inverter; 電動車輌の構成を説明するための概略構成図である。1 is a schematic configuration diagram for explaining the configuration of an electric vehicle; FIG.
　本開示の目的、特色、および利点は、下記の詳細な説明と図面とからより明確になるであろう。 The objects, features, and advantages of the present disclosure will become clearer from the detailed description and drawings below.
　本開示のフィルムコンデンサの基礎となる構成のフィルムコンデンサは、金属箔を電極に用いるものと、誘電体フィルム上に設けた蒸着金属を電極に用いるものとに大別される。そして、なかでも蒸着金属を電極（以下、蒸着電極）とする金属化フィルムコンデンサは、金属箔のものに比べて電極の占める体積が小さく、小型軽量化が図れることと、蒸着電極特有の自己回復性能（絶縁欠陥部で短絡が生じた場合に、短絡のエネルギーで絶縁欠陥部周辺の蒸着電極が蒸発・飛散して絶縁化し、コンデンサの機能が回復する性能）により絶縁破壊に対する信頼性が高いことから、従来から広く用いられている。 A film capacitor having a configuration that forms the basis of the film capacitor of the present disclosure is roughly classified into one that uses a metal foil as an electrode and one that uses a vapor-deposited metal provided on a dielectric film as an electrode. In particular, metallized film capacitors, which use vapor-deposited metal as electrodes (hereinafter referred to as vapor-deposited electrodes), have a smaller electrode volume than metal foil capacitors, and can be made smaller and lighter. High reliability against dielectric breakdown due to its performance (when a short circuit occurs at an insulation defect, the energy of the short circuit evaporates and scatters the vapor-deposited electrode around the insulation defect, insulating it and restoring the function of the capacitor). Therefore, it has been widely used in the past.
　しかしながら、フィルムコンデンサの課題の一つとして、電極膜の陽極酸化による静電容量の減少（失活）があった。従来は、環境からの湿分の侵入を抑制するために、モールド樹脂による封止や、電極膜の材料を通常のアルミニウムに加えて、より酸化しにくいマグネシウムが導入されている。また、酸化の影響を低減するために特定の膜厚を厚くすることがある。 However, one of the problems with film capacitors was the decrease in capacitance (deactivation) due to the anodization of the electrode film. Conventionally, in order to suppress the intrusion of moisture from the environment, magnesium, which is more difficult to oxidize, has been introduced in addition to sealing with mold resin and the material of electrode films in addition to ordinary aluminum. Also, a specific film thickness may be increased to reduce the effects of oxidation.
　陽極側の電極を厚くする（シート抵抗を小さくする）ことにより、高温高湿下での寿命は伸びるが、コンデンサの特定の層にショートが発生した場合に、電極が飛散して電気的オープンとなる自己回復機能が低下して、ショート故障が発生することがある。 By making the electrode on the anode side thicker (reducing the sheet resistance), the life under high temperature and high humidity conditions can be extended. The self-recovery function of the battery may be degraded and a short failure may occur.
　本開示は、電極膜の陽極酸化による寿命低下を抑制することができ、安定した自己回復性能を有するフィルムコンデンサを提供することを目的とする。 An object of the present disclosure is to provide a film capacitor capable of suppressing a decrease in life due to anodization of the electrode film and having stable self-recovery performance.
　本開示の第１実施形態のフィルムコンデンサ１１について説明する。図１は、第１実施形態のフィルムコンデンサ１１の構成を示す図である。図１Ａ、図１Ｂは誘電体フィルム１，２の平面図、図１Ｃは誘電体フィルム１，２の積層状態を示す断面模式図である。図２は、誘電体フィルム１，２および金属層３Ａ，３Ｂ，８の積層構造を示す拡大断面図である。本実施形態のフィルムコンデンサ１１は、フィルム積層体４の両端面に第１メタリコン５Ａおよび第２メタリコン５Ｂが形成されている。フィルム積層体４は、図１Ａに示すような、ベースフィルムの一面に、第１金属層３Ａ，３Ｂを有する誘電体フィルム（第１誘電体フィルム）１と、図１Ｂに示すような、ベースフィルムの一面に、第２金属層８を有する誘電体フィルム（第２誘電体フィルム）２とを、交互に積層して構成される。 A film capacitor 11 according to the first embodiment of the present disclosure will be described. FIG. 1 is a diagram showing the configuration of a film capacitor 11 according to the first embodiment. 1A and 1B are plan views of dielectric films 1 and 2, and FIG. 1C is a schematic cross-sectional view showing a laminated state of dielectric films 1 and 2. FIG. FIG. 2 is an enlarged sectional view showing a laminated structure of dielectric films 1 and 2 and metal layers 3A, 3B and 8. As shown in FIG. In the film capacitor 11 of this embodiment, a first metallikon 5A and a second metallikon 5B are formed on both end surfaces of a film laminate 4. As shown in FIG. The film laminate 4 includes a dielectric film (first dielectric film) 1 having first metal layers 3A and 3B on one surface of a base film as shown in FIG. 1A, and a base film as shown in FIG. A dielectric film (second dielectric film) 2 having a second metal layer 8 is alternately laminated on one surface.
　金属化フィルムは、誘電体フィルム１，２と、絶縁マージンが残るように誘電体フィルム１，２の上面に形成された第１金属層３Ａ，３Ｂ，第２金属層８とを有している。各々の絶縁マージンＳは、各々の誘電体フィルム１，２の幅方向において、誘電体フィルム１，２の長さ方向に延在するものである。 The metallized film has dielectric films 1, 2 and first metal layers 3A, 3B and a second metal layer 8 formed on the upper surfaces of the dielectric films 1, 2 so as to leave an insulating margin. . Each insulation margin S extends in the length direction of each dielectric film 1,2 in the width direction of each dielectric film 1,2.
　ここで、誘電体フィルム１，２のフィルム幅方向（以下、単に幅方向と称する）とは、第１メタリコン５Ａ，第２メタリコン５Ｂの対向方向である。 Here, the film width direction of the dielectric films 1 and 2 (hereinafter simply referred to as the width direction) is the facing direction of the first metallikon 5A and the second metallikon 5B.
　次に、金属化フィルムを構成する誘電体フィルム１，２および第１金属層３Ａ，３Ｂ，第２金属層８について詳しく説明する。 Next, the dielectric films 1 and 2, the first metal layers 3A and 3B, and the second metal layer 8 that constitute the metallized film will be described in detail.
　誘電体フィルム１，２は、第１メタリコン５Ａ，第２メタリコン５Ｂと接続されるフィルムであり、例えばポリプロピレン製である。誘電体フィルム１，２の厚さは、例えば２．８μｍとされる。なお、誘電体フィルム１，２の材質または厚さはこれに限られるものではない。 The dielectric films 1 and 2 are films connected to the first metallikon 5A and the second metallikon 5B, and are made of polypropylene, for example. The thickness of the dielectric films 1 and 2 is, for example, 2.8 μm. Note that the material and thickness of the dielectric films 1 and 2 are not limited to these.
　第１金属層３Ａ，３Ｂ，第２金属層８は、例えば、アルミニウムが用いられている。 Aluminum, for example, is used for the first metal layers 3A, 3B and the second metal layer 8.
　誘電体フィルム１の第１金属層３Ａは、第１共通金属層３Ａｃと、第１共通金属層３Ａｃに接続される第１帯状金属層３Ａａとを含む。第１金属層３Ｂは、第２共通金属層３Ｂｃと、第２共通金属層３Ｂｃに接続される第２帯状金属層３Ｂａとを含む。第１帯状金属層３Ａａおよび第２帯状金属層３Ｂａは、第１の方向に延びている。第１共通金属層３Ａｃおよび第２共通金属層３Ｂｃは、誘電体フィルム１の第１の方向の第１の縁部および第２の縁部において、それぞれ第２の方向に延びて設けられている。第１共通金属層３Ａｃは、第１メタリコン５Ａと電気的に接続し、第２共通金属層３Ｂｃは、第２メタリコン５Ｂと電気的に接続する。本実施形態では、第１メタリコン５Ａ側の第１帯状金属層３Ａａと、第２メタリコン５Ｂ側の第２帯状金属層３Ｂａとの間は、フィルム面が露出しており、電気的に絶縁された状態となっている。この露出したフィルム面は、誘電体フィルム１の第１の方向の中央部において、第２の方向に沿って連続する中央部絶縁領域Ｔｃとなっている。 The first metal layer 3A of the dielectric film 1 includes a first common metal layer 3Ac and a first strip-shaped metal layer 3Aa connected to the first common metal layer 3Ac. The first metal layer 3B includes a second common metal layer 3Bc and a second strip-shaped metal layer 3Ba connected to the second common metal layer 3Bc. The first strip-shaped metal layer 3Aa and the second strip-shaped metal layer 3Ba extend in the first direction. The first common metal layer 3Ac and the second common metal layer 3Bc are provided extending in the second direction at the first edge and the second edge in the first direction of the dielectric film 1, respectively. . The first common metal layer 3Ac is electrically connected to the first metallikon 5A, and the second common metal layer 3Bc is electrically connected to the second metallikon 5B. In the present embodiment, the film surface is exposed between the first strip-shaped metal layer 3Aa on the side of the first metallikon 5A and the second strip-shaped metal layer 3Ba on the side of the second metallikon 5B, and is electrically insulated. state. This exposed film surface serves as a central insulating region Tc continuous along the second direction in the central portion of the dielectric film 1 in the first direction.
　誘電体フィルム２の第２金属層８は、いわゆるベタパターンの１つの面状金属層である。誘電体フィルム２の第１の方向の第１の縁部および第２の縁部には、第２の方向に連続する縁部絶縁領域Ｔが設けられ、この縁部絶縁領域Ｔによって第２金属層８は、第１メタリコン５Ａおよび第２メタリコン５Ｂと電気的に絶縁された状態となっている。 The second metal layer 8 of the dielectric film 2 is one planar metal layer of a so-called solid pattern. A first edge and a second edge in the first direction of the dielectric film 2 are provided with an edge insulation region T continuous in the second direction. Layer 8 is in a state of being electrically insulated from first metallikon 5A and second metallikon 5B.
　第２金属層８は、第１電極膜１５および第２電極膜１６を有しており、第１電極膜１５および第２電極膜１６の間には、接続層７１を有している。平面透視して、第１帯状金属層３Ａａと第２電極膜１６とが重なり、第２帯状金属層３Ｂａと第１電極膜１５とが重なるように配置されている。第２帯状金属層３Ｂａは、第１電極膜１５よりも厚みが厚い。第１電極膜１５は、第２電極膜１６よりも厚みが薄い。第１帯状金属層３Ａａは、第２帯状金属層３Ｂａよりも厚みが薄く、第２電極膜１６よりも厚みが薄い。 The second metal layer 8 has a first electrode film 15 and a second electrode film 16 , and a connection layer 71 between the first electrode film 15 and the second electrode film 16 . When viewed through the plane, the first strip-shaped metal layer 3Aa and the second electrode film 16 are overlapped, and the second strip-shaped metal layer 3Ba and the first electrode film 15 are arranged so as to be overlapped. The second strip-shaped metal layer 3Ba is thicker than the first electrode film 15. As shown in FIG. The first electrode film 15 is thinner than the second electrode film 16 . The first strip-shaped metal layer 3</b>Aa is thinner than the second strip-shaped metal layer 3</b>Ba and thinner than the second electrode film 16 .
　フィルム積層体４は、平面視で、第１金属層３Ａの第１帯状金属層３Ａａと、第２金属層８の第２電極膜１６とが重なるように積層され、第１金属層３Ｂの第２帯状金属層３Ｂａと、第２金属層８の第１電極膜１５とが重なるように積層されている。フィルムコンデンサ１１は、第１メタリコン５Ａ側の第１共通金属層３Ａｃ、第１帯状金属層３Ａａと、第２電極膜１６とによる積層型コンデンサと、第２メタリコン５Ｂ側の第２共通金属層３Ｂｃ、第２帯状金属層３Ｂａと、第１電極膜１５とによる積層型コンデンサとが、第２金属層８によって直列接続される。本実施形態のフィルムコンデンサ１１は、シリーズコンデンサとすることで、高耐圧化を実現できる。 The film laminate 4 is laminated such that the first strip-shaped metal layer 3Aa of the first metal layer 3A and the second electrode film 16 of the second metal layer 8 overlap in plan view, and the second electrode film 16 of the first metal layer 3B is laminated. The two strip-shaped metal layers 3Ba and the first electrode film 15 of the second metal layer 8 are laminated so as to overlap each other. The film capacitor 11 is a multilayer capacitor composed of the first common metal layer 3Ac, the first strip-shaped metal layer 3Aa on the first metallikon 5A side, and the second electrode film 16, and the second common metal layer 3Bc on the second metallikon 5B side. , the second strip-shaped metal layer 3Ba and the multilayer capacitor formed of the first electrode film 15 are connected in series by the second metal layer 8. As shown in FIG. The film capacitor 11 of this embodiment can achieve a high withstand voltage by using a series capacitor.
　本実施形態では、例えば、平面視で、複数の第１帯状金属層３Ａａ，第２帯状金属層３Ｂａと第２金属層８とが重なっており、第２金属層８は、第１共通金属層３Ａｃおよび第２共通金属層３Ｂｃとは重なっていない。第２金属層８は、複数の面状金属層を含んでいてもよく、各面状金属層が、それぞれ平面視で第１帯状金属層３Ａａ、第２帯状金属層３Ｂａと重なっていればよい。 In the present embodiment, for example, the plurality of first strip-shaped metal layers 3Aa, the second strip-shaped metal layers 3Ba, and the second metal layer 8 overlap in plan view, and the second metal layer 8 is the first common metal layer. It does not overlap with 3Ac and the second common metal layer 3Bc. The second metal layer 8 may include a plurality of planar metal layers as long as each planar metal layer overlaps the first strip-shaped metal layer 3Aa and the second strip-shaped metal layer 3Ba in plan view. .
　本開示の第２実施形態のフィルムコンデンサ１１では、対向する第１帯状金属層３Ａａと第２電極膜１６とのうち少なくとも一方および対向する第２帯状金属層３Ｂａと第１電極膜１５とのうち少なくとも一方を薄くすることで、破壊発生時に、破壊箇所の電極膜を過渡的な大きな電流により飛散させることができる。これによって、自己回復性を得ることができる。 In the film capacitor 11 of the second embodiment of the present disclosure, at least one of the facing first strip-shaped metal layer 3Aa and the second electrode film 16 and between the facing second strip-shaped metal layer 3Ba and the first electrode film 15 By thinning at least one of them, the electrode film at the fracture site can be scattered by a transient large current when the fracture occurs. This provides self-healing properties.
　本開示の第２実施形態のフィルムコンデンサ６１について説明する。図３Ａ、図３Ｂは誘電体フィルム１，２の平面図、図３Ｃは誘電体フィルム１，２の積層状態を示す断面模式図である。図４は、誘電体フィルム１，２および金属層３Ａ，３Ｂ，８の積層構造を示す拡大断面図である。第１実施形態の説明と重複する部分については説明を省略し、同一の参照符を用いることとする。第２帯状金属層３Ｂａよりも厚みが薄い第１帯状金属層３Ａａは、それぞれ２つ以上に分割された状態で、ヒューズ６７によって接続されており、第２電極膜１６よりも厚みが薄い第１電極膜１５は、２つ以上に分割された状態で、ヒューズ６８によって接続されている。 A film capacitor 61 according to the second embodiment of the present disclosure will be described. 3A and 3B are plan views of the dielectric films 1 and 2, and FIG. 3C is a schematic cross-sectional view showing the laminated state of the dielectric films 1 and 2. FIG. FIG. 4 is an enlarged sectional view showing a laminate structure of dielectric films 1 and 2 and metal layers 3A, 3B and 8. As shown in FIG. Descriptions of portions that overlap with the description of the first embodiment are omitted, and the same reference numerals are used. The first strip-shaped metal layer 3Aa, which is thinner than the second strip-shaped metal layer 3Ba, is divided into two or more and connected by a fuse 67, and the first strip-shaped metal layer 3Aa thinner than the second electrode film 16 is connected. The electrode film 15 is connected by a fuse 68 while being divided into two or more.
　本実施形態においては、ヒューズ６７が、対向する第１帯状金属層３Ａａと第２電極膜１６とのうちの薄い方の第１帯状金属層３Ａａに設けており、ヒューズ６８が、対向する第２帯状金属層３Ｂａと第１電極膜１５とのうちの薄い方の第１電極膜１５に設けている。これによって、金属膜の自己回復性が不十分な場合においても、ヒューズが切れて破壊箇所を切り離すことが出来る。 In this embodiment, the fuse 67 is provided in the thin first strip-shaped metal layer 3Aa of the facing first strip-shaped metal layer 3Aa and the second electrode film 16, and the fuse 68 is provided in the opposing second strip-shaped metal layer 3Aa. It is provided on the thin first electrode film 15 of the strip-like metal layer 3Ba and the first electrode film 15. As shown in FIG. As a result, even if the self-healing property of the metal film is insufficient, the fuse can be blown to separate the broken portion.
　各第１帯状金属層３Ａａが２つ以上に分割された各小セルの面積の和に、各誘電体フィルム１に形成される第１帯状金属層３Ａａの個数を乗じて得られる面積と、各誘電体フィルム２に形成される第１電極膜１５が２つ以上に分割された各小セルの面積の和とを等しくする。たとえば、第１帯状金属層３Ａａが小セル３Ａａ１，３Ａａ２の２つの小セルに分割されており、第１電極膜１５が２つの小セル１５１，１５２に分割されている場合には、各小セル３Ａａ１，３Ａａ２の面積の和に、各誘電体フィルム１に形成される第１帯状金属層３Ａａの個数を乗じて得られる面積と、各誘電体フィルム２に形成される小セル１５１，１５２の面積の和とを等しくする。 an area obtained by multiplying the sum of the areas of each small cell obtained by dividing each first strip-shaped metal layer 3Aa into two or more by the number of the first strip-shaped metal layers 3Aa formed on each dielectric film 1; The sum of the areas of the small cells obtained by dividing the first electrode film 15 formed on the dielectric film 2 into two or more is equalized. For example, when the first strip-shaped metal layer 3Aa is divided into two small cells 3Aa1 and 3Aa2, and the first electrode film 15 is divided into two small cells 151 and 152, each small cell The area obtained by multiplying the sum of the areas of 3Aa1 and 3Aa2 by the number of the first strip-shaped metal layers 3Aa formed on each dielectric film 1, and the area of the small cells 151 and 152 formed on each dielectric film 2 equal to the sum of
　本実施形態のフィルムコンデンサ６１は、前述のフィルムコンデンサ１１と同様にシリーズコンデンサとなっている。各小セルの面積を上記のようにすることで、直列接続された二つのコンデンサの容量が等しくなる。シリーズコンデンサにおいては、直列接続されるコンデンサにかかる電圧は各セルの容量比に依存する。本実施形態のように直列接続された二つのコンデンサの容量が同じ場合、電圧Ｖを印加すると、各コンデンサにかかる電圧は等しく（１／２）Ｖとなる。直列接続された二つのコンデンサの容量が異なる場合、一方のコンデンサの負荷が大きくなり、寿命が短くなる。シリーズコンデンサで構成する一方のコンデンサが破壊すると残りのコンデンサにかかる負荷が大きくなり、雪崩式に破壊が進み、短寿命のコンデンサになってしまう。 The film capacitor 61 of this embodiment is a series capacitor like the film capacitor 11 described above. By setting the area of each small cell as described above, the capacity of the two capacitors connected in series becomes equal. In series capacitors, the voltage across the capacitors connected in series depends on the capacitance ratio of each cell. When two capacitors connected in series have the same capacitance as in this embodiment, when a voltage V is applied, the voltage applied to each capacitor is equal (1/2)V. If the two capacitors connected in series have different capacities, the load on one of the capacitors increases, shortening the life of the capacitor. If one of the series capacitors breaks down, the load on the remaining capacitors increases, and the breakdown progresses in an avalanche fashion, resulting in short-lived capacitors.
　本実施形態のフィルムコンデンサ６１は、シリーズコンデンサを構成する二つのコンデンサにかかる負荷を均一にすることができ、長寿命で高信頼性な高耐電圧コンデンサを実現できる。 The film capacitor 61 of this embodiment can equalize the load applied to the two capacitors that make up the series capacitor, and realize a long-life, highly reliable, and high withstand voltage capacitor.
　図５は、フィルムコンデンサの変形例を示す、一部が切り欠かれた斜視図である。フィルムコンデンサＡは、絶縁性および耐環境性の点から、フィルムコンデンサ１１を外装部材７で被覆したものである。第１メタリコン５Ａ，第２メタリコン５Ｂには、外部接続用のリード線６が設けられている。図５においては、外装部材７の一部を取り除いた状態を示しており、外装部材７の取り除かれた部分を破線で示している。 FIG. 5 is a partially cutaway perspective view showing a modification of the film capacitor. The film capacitor A is obtained by covering a film capacitor 11 with an exterior member 7 in terms of insulation and environmental resistance. Lead wires 6 for external connection are provided to the first metallikon 5A and the second metallikon 5B. FIG. 5 shows a state in which a part of the exterior member 7 is removed, and the removed portion of the exterior member 7 is indicated by a broken line.
　図６は、連結型コンデンサの構成を模式的に示した斜視図である。図６においては構成を分かりやすくするために、ケースおよびモールド用の樹脂を省略して記載している。連結型コンデンサＢは、複数個のフィルムコンデンサＡが一対のバスバー２１、２３により並列接続された構成となっている。バスバー２１、２３は、端子部２１ａ、２３ａと、引出端子部２１ｂ、２３ｂと、により構成されている。端子部２１ａ、２３ａは外部接続用であり、引出端子部２１ｂ、２３ｂは、フィルムコンデンサＡの外部電極である第１メタリコン５Ａ、第２メタリコン５Ｂにそれぞれ接続される。 FIG. 6 is a perspective view schematically showing the configuration of a coupled capacitor. In FIG. 6, the case and the molding resin are omitted in order to make the configuration easier to understand. The coupled capacitor B has a configuration in which a plurality of film capacitors A are connected in parallel by a pair of bus bars 21 and 23 . The busbars 21 and 23 are composed of terminal portions 21a and 23a and lead terminal portions 21b and 23b. The terminal portions 21a and 23a are for external connection, and the lead terminal portions 21b and 23b are connected to the first metallikon 5A and the second metallikon 5B, which are the external electrodes of the film capacitor A, respectively.
　図７は、インバータの構成を説明するための電気回路図である。図７には、整流後の直流から交流を作り出すインバータＣの例を示している。本実施形態のインバータＣは、図７に示すように、ブリッジ回路３１と、容量部３３を備えている。ブリッジ回路３１は、例えば、ＩＧＢＴ（Insulated Gate Bipolar Transistor）のようなスイッチング素子と、ダイオードにより構成される。容量部３３は、ブリッジ回路３１の入力端子間に配置され、電圧を安定化する。インバータＣは、容量部３３として、上記のフィルムコンデンサ１１，Ａまたは連結型コンデンサＢを含んでよい。 FIG. 7 is an electric circuit diagram for explaining the configuration of the inverter. FIG. 7 shows an example of an inverter C that generates alternating current from rectified direct current. The inverter C of this embodiment includes a bridge circuit 31 and a capacitor section 33, as shown in FIG. The bridge circuit 31 is composed of, for example, switching elements such as IGBTs (Insulated Gate Bipolar Transistors) and diodes. The capacitive section 33 is arranged between the input terminals of the bridge circuit 31 and stabilizes the voltage. The inverter C may include the film capacitors 11 and A or the coupled capacitor B as the capacitive section 33 .
　なお、このインバータＣの入力は、直流電源の電圧を昇圧する昇圧回路３５に接続される場合と、直流電源に接続される場合がある。一方、ブリッジ回路３１は駆動源となるモータジェネレータ（モータＭ）に接続される。 The input of this inverter C may be connected to the booster circuit 35 for boosting the voltage of the DC power supply or may be connected to the DC power supply. On the other hand, the bridge circuit 31 is connected to a motor generator (motor M) as a drive source.
　図８は、電動車輌の構成を説明するための概略構成図である。図８には、電動車輌Ｄとしてハイブリッド自動車（ＨＥＶ）の例を示している。 FIG. 8 is a schematic configuration diagram for explaining the configuration of the electric vehicle. FIG. 8 shows an example of a hybrid electric vehicle (HEV) as the electric vehicle D. As shown in FIG.
　図８における電動車輌Ｄは、駆動用のモータ４１、エンジン４３、トランスミッション４５、インバータ４７、電源（電池）４９、前輪５１ａおよび後輪５１ｂを備えている。 An electric vehicle D in FIG. 8 includes a driving motor 41, an engine 43, a transmission 45, an inverter 47, a power supply (battery) 49, front wheels 51a and rear wheels 51b.
　この電動車輌Ｄは、駆動源としてモータ４１またはエンジン４３、もしくはその両方を備えている。駆動源の出力は、トランスミッション４５を介して左右一対の前輪５１ａに伝達される。電源４９は、インバータ４７に接続され、インバータ４７はモータ４１に接続されている。 This electric vehicle D has a motor 41, an engine 43, or both as a drive source. The output of the drive source is transmitted via the transmission 45 to the pair of left and right front wheels 51a. The power supply 49 is connected to the inverter 47 and the inverter 47 is connected to the motor 41 .
　また、図８に示した電動車輌Ｄは、車輌ＥＣＵ５３およびエンジンＥＣＵ５７を備えている。車輌ＥＣＵ５３は電動車輌Ｄ全体の統括的な制御を行う。エンジンＥＣＵ５７は、エンジン４３の回転数を制御し電動車輌Ｄを駆動する。電動車輌Ｄは、さらに運転者等に操作されるイグニッションキー５５、図示しないアクセルペダル、及びブレーキ等の運転装置を備えている。車輌ＥＣＵには、運転者等による運転装置の操作に応じた駆動信号が入力される。この車輌ＥＣＵ５３は、その駆動信号に基づいて指示信号をエンジンＥＣＵ５７、電源４９、および負荷としてのインバータ４７に出力する。エンジンＥＣＵ５７は、指示信号に応答してエンジン４３の回転数を制御し、電動車輌Ｅを駆動する。本実施形態のフィルムコンデンサＡ，１０または連結型コンデンサＢを容量部３３として適用したインバータＣを、図８に示すような電動車輌Ｄに搭載することができる。 Also, the electric vehicle D shown in FIG. 8 includes a vehicle ECU 53 and an engine ECU 57 . The vehicle ECU 53 performs overall control of the electric vehicle D as a whole. The engine ECU 57 drives the electric vehicle D by controlling the rotation speed of the engine 43 . The electric vehicle D further includes driving devices such as an ignition key 55 operated by the driver or the like, an accelerator pedal (not shown), and a brake. A vehicle ECU receives a driving signal according to the operation of the driving device by the driver or the like. The vehicle ECU 53 outputs an instruction signal to the engine ECU 57, the power supply 49, and the inverter 47 as a load based on the drive signal. The engine ECU 57 drives the electric vehicle E by controlling the rotation speed of the engine 43 in response to the instruction signal. An inverter C using the film capacitors A and 10 or the coupled capacitor B of the present embodiment as the capacitance section 33 can be mounted on an electric vehicle D as shown in FIG.
　なお、本実施形態のインバータＣは、上記のハイブリッド自動車（ＨＥＶ）のみならず、電気自動車（ＥＶ）または電動自転車、発電機、太陽電池など種々の電力変換応用製品に適用できる。 It should be noted that the inverter C of this embodiment can be applied not only to the hybrid electric vehicle (HEV) described above, but also to various power conversion application products such as electric vehicles (EV) or electric bicycles, generators, and solar cells.
　本開示は次の実施の形態が可能である。 The present disclosure enables the following embodiments.
　本開示のフィルムコンデンサは、一面に第１金属層が配設され、該一面の第１の方向の第１の縁部および第２の縁部に、前記第１の方向に直交する第２の方向に連続する第１共通金属層および第２共通金属層がそれぞれ設けられた第１誘電体フィルムと、一面に第２金属層が配設され、該一面の第１の方向の第１の縁部および第２の縁部に、前記第１の方向に直交する前記第２の方向に連続する縁部絶縁領域が設けられた第２誘電体フィルムとが、前記縁部絶縁領域の平面視位置が１枚おきに重なるように複数枚積層された直方体状のフィルム積層体と、前記フィルム積層体の前記第１の方向の一対の端面のそれぞれに形成され、前記第１金属層に電気的に接続される第１金属電極および第２金属電極を含む。前記第１金属電極および前記第２金属電極に電気的に接続される前記第１金属層は、前記第１の方向に延びて、前記第１共通金属層および前記第２共通金属層にそれぞれ電気的に接続される複数の第１帯状金属層および第２帯状金属層を有する。前記第２金属層は、前記第１の方向に延びて前記第１共通金属層および前記第２共通金属層と電気的に接続されない第１電極膜と第２電極膜とを有する。平面透視して、前記第１帯状金属層と前記第１電極膜とが重なり、前記第２帯状金属層と前記第２電極膜とが重なるように配置されている。前記第２帯状金属層は、前記第１帯状金属層よりも厚みが厚く、前記第１電極膜は、前記第２電極膜よりも厚みが薄い。 In the film capacitor of the present disclosure, a first metal layer is provided on one surface, and second metal layers orthogonal to the first direction are provided on a first edge and a second edge in a first direction of the one surface. A first dielectric film provided with a first common metal layer and a second common metal layer which are continuous in a direction, and a second metal layer provided on one surface and a first edge in the first direction on the one surface. and a second dielectric film provided with an edge insulating region continuous in the second direction orthogonal to the first direction at the second edge and the edge insulating region at the position in plan view of the edge insulating region. is formed on each of a rectangular parallelepiped film laminate in which a plurality of sheets are laminated so that every other sheet overlaps, and a pair of end surfaces of the film laminate in the first direction, and the first metal layer is electrically connected to the It includes a first metal electrode and a second metal electrode that are connected. The first metal layer electrically connected to the first metal electrode and the second metal electrode extends in the first direction to electrically connect the first common metal layer and the second common metal layer, respectively. It has a plurality of first strip-shaped metal layers and second strip-shaped metal layers that are statically connected. The second metal layer has a first electrode film and a second electrode film that extend in the first direction and are not electrically connected to the first common metal layer and the second common metal layer. When viewed through a plane, the first strip-shaped metal layer and the first electrode film are arranged to overlap, and the second strip-shaped metal layer and the second electrode film are arranged to overlap. The second strip-shaped metal layer is thicker than the first strip-shaped metal layer, and the first electrode film is thinner than the second electrode film.
　本開示の連結型コンデンサは、複数のフィルムコンデンサと、該複数のフィルムコンデンサを接続するバスバーと、を備えている連結型コンデンサであって、前記フィルムコンデンサが、上記のいずれかに記載のフィルムコンデンサである。 A coupled capacitor of the present disclosure is a coupled capacitor including a plurality of film capacitors and a bus bar connecting the plurality of film capacitors, wherein the film capacitor is any one of the film capacitors described above. is.
　本開示のインバータは、スイッチング素子により構成されるブリッジ回路と、該ブリッジ回路に接続された容量部とを備えているインバータであって、前記容量部が上記のいずれかに記載のフィルムコンデンサである。 An inverter of the present disclosure is an inverter including a bridge circuit configured by switching elements and a capacitor connected to the bridge circuit, wherein the capacitor is any one of the film capacitors described above. .
　本開示の電動車輌は、電源と、該電源に接続された上記インバータと、該インバータに接続されたモータと、該モータにより駆動する車輪と、を備えている。 An electric vehicle of the present disclosure includes a power supply, the inverter connected to the power supply, a motor connected to the inverter, and wheels driven by the motor.
　１　　　誘電体フィルム（第１誘電体フィルム）
　２　　　誘電体フィルム（第２誘電体フィルム）
　３Ａ　　　金属層（第１金属層）
　３Ｂ　　　金属層（第１金属層）
　３Ａａ　第１帯状金属層
　３Ａａ１、３Ａａ２，１５１，１５２　小セル
　３Ｂａ　第２帯状金属層
　３Ａｃ　第１共通金属層
　３Ｂｃ　第２共通金属層
　４　　　フィルム積層体
　５Ａ　　第１メタリコン（第１金属電極）
　５Ｂ　　第２メタリコン（第２金属電極）
　６　　　リード線
　７　　　外装部材
　８　　第２金属層
　１１，６１　　フィルムコンデンサ
　１５　　第１電極膜
　１６　　第２電極膜
　２１，２３　　バスバー
　２１ａ　端子部
　２１ｂ　引出端子部
　２３ａ　端子部　
　２３ｂ　引出端子部
　３１　　ブリッジ回路
　３３　　容量部
　３５　　昇圧回路
　４１　　モータ
　４３　　エンジン
　４５　　トランスミッション
　４７　　インバータ
　４９　　電源
　５１ａ　前輪
　５１ｂ　後輪
　５３　　車輌ＥＣＵ
　５５　　イグニッションキー
　５７　　エンジンＥＣＵ
　６７，６８　ヒューズ
　７１　　接続部
　Ａ　　フィルムコンデンサ
　Ｂ　　　連結型コンデンサ
　Ｃ　　　インバータ
　Ｄ　　　電動車輌
　Ｅ　　　電動車輌
　Ｍ　　　モータ
　Ｓ　絶縁マージン
　Ｔ　縁部絶縁領域
　Ｔｃ　中央部絶縁領域 1 Dielectric film (first dielectric film)
2 Dielectric film (second dielectric film)
3A metal layer (first metal layer)
3B metal layer (first metal layer)
3Aa First strip-shaped metal layer 3Aa1, 3Aa2, 151, 152 Small cell 3Ba Second strip-shaped metal layer 3Ac First common metal layer 3Bc Second common metal layer 4 Film laminate 5A First metallikon (first metal electrode)
5B Second metallikon (second metal electrode)
6 lead wire 7 exterior member 8 second metal layer 11, 61 film capacitor 15 first electrode film 16 second electrode film 21, 23 bus bar 21a terminal portion 21b lead terminal portion 23a terminal portion
23b lead terminal portion 31 bridge circuit 33 capacity portion 35 booster circuit 41 motor 43 engine 45 transmission 47 inverter 49 power supply 51a front wheel 51b rear wheel 53 vehicle ECU
55 Ignition key 57 Engine ECU
67, 68 Fuse 71 Connection Part A Film Capacitor B Concatenated Capacitor C Inverter D Electric Vehicle E Electric Vehicle M Motor S Insulation Margin T Edge Insulation Area Tc Central Insulation Area

Claims (6)

  1. 　一面に第１金属層が配設され、該一面の第１の方向の第１の縁部および第２の縁部に、前記第１の方向に直交する第２の方向に連続する第１共通金属層および第２共通金属層がそれぞれ設けられた第１誘電体フィルムと、
    　一面に第２金属層が配設され、該一面の第１の方向の第１の縁部および第２の縁部に、前記第１の方向に直交する前記第２の方向に連続する縁部絶縁領域が設けられた第２誘電体フィルムとが、
    　前記縁部絶縁領域の平面視位置が１枚おきに重なるように複数枚積層された直方体状のフィルム積層体と、
    　前記フィルム積層体の前記第１の方向の一対の端面のそれぞれに形成され、前記第１金属層に電気的に接続される第１金属電極および第２金属電極を含み、
    　前記第１金属電極および前記第２金属電極に電気的に接続される前記第１金属層は、前記第１の方向に延びて、前記第１共通金属層および前記第２共通金属層にそれぞれ電気的に接続される複数の第１帯状金属層および第２帯状金属層を有し、
    　前記第２金属層は、前記第１の方向に延びて前記第１共通金属層および前記第２共通金属層と電気的に接続されない第１電極膜と第２電極膜とを有し、
    　平面透視して、前記第１帯状金属層と前記第１電極膜とが重なり、前記第２帯状金属層と前記第２電極膜とが重なるように配置されており、
    　前記第２帯状金属層は、前記第１帯状金属層よりも厚みが厚く、
    　前記第１電極膜は、前記第２電極膜よりも厚みが薄い、
    フィルムコンデンサ。     A first metal layer is disposed on one surface, and a first common metal layer continuous in a second direction orthogonal to the first direction is provided on a first edge portion and a second edge portion in a first direction of the one surface. a first dielectric film provided with a metal layer and a second common metal layer, respectively;
    A second metal layer is provided on one surface, and an edge continuous in the second direction orthogonal to the first direction is provided on the first edge and the second edge in the first direction of the one surface. a second dielectric film provided with an insulating region,
    a rectangular parallelepiped film laminate in which a plurality of film laminates are laminated such that the positions of the edge insulating regions in a plan view overlap with each other;
    a first metal electrode and a second metal electrode formed on each of a pair of end surfaces of the film laminate in the first direction and electrically connected to the first metal layer;
    The first metal layer electrically connected to the first metal electrode and the second metal electrode extends in the first direction to electrically connect the first common metal layer and the second common metal layer, respectively. having a plurality of first strip-shaped metal layers and second strip-shaped metal layers that are physically connected,
    the second metal layer has a first electrode film and a second electrode film that extend in the first direction and are not electrically connected to the first common metal layer and the second common metal layer;
    When viewed through a plane, the first strip-shaped metal layer and the first electrode film are arranged to overlap, and the second strip-shaped metal layer and the second electrode film are arranged to overlap,
    The second strip-shaped metal layer is thicker than the first strip-shaped metal layer,
    The first electrode film is thinner than the second electrode film,
    Film capacitor.
  2. 　前記第１帯状金属層および前記第１電極膜は、少なくとも２つ以上に分割され、ヒューズ電極にて接続されている請求項１に記載のフィルムコンデンサ。 The film capacitor according to claim 1, wherein the first strip-shaped metal layer and the first electrode film are divided into at least two or more and connected by a fuse electrode.
  3. 　前記第１帯状金属層および前記第１電極膜の面積は同じである、請求項２に記載のフィルムコンデンサ。 The film capacitor according to claim 2, wherein the first strip-shaped metal layer and the first electrode film have the same area.
  4. 　複数のフィルムコンデンサと、該複数のフィルムコンデンサを接続するバスバーと、を備え、
    　前記フィルムコンデンサが、請求項１～３のいずれか１つに記載のフィルムコンデンサを含む、連結型コンデンサ。     comprising a plurality of film capacitors and a bus bar connecting the plurality of film capacitors,
    A coupled capacitor, wherein the film capacitor comprises the film capacitor according to any one of claims 1-3.
  5. 　スイッチング素子により構成されたブリッジ回路と、該ブリッジ回路に接続された容量部とを備え、
    　前記容量部が、請求項１～３のいずれか１つに記載のフィルムコンデンサを含む、インバータ。     comprising a bridge circuit composed of switching elements and a capacitor connected to the bridge circuit,
    An inverter, wherein the capacitive section includes the film capacitor according to any one of claims 1 to 3.
  6. 　電源と、該電源に接続されたインバータと、該インバータに接続されたモータと、該モータにより駆動する車輪と、を備え、
    　前記インバータが、請求項５に記載のインバータである、電動車輌。     A power supply, an inverter connected to the power supply, a motor connected to the inverter, and wheels driven by the motor,
    An electric vehicle, wherein the inverter is the inverter according to claim 5 .
PCT/JP2022/013293 2021-03-30 2022-03-22 Film capacitor, coupling capacitor, inverter, and electric vehicle WO2022210130A1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017014312A (en) * 2015-06-26 2017-01-19 京セラ株式会社 Dielectric film and metalized film, film capacitor and connection type capacitor using the same, and inverter and electric vehicle
WO2018190437A1 (en) * 2017-04-14 2018-10-18 京セラ株式会社 Film capacitor, connection-type capacitor, and inverter and electric vehicle in which said capacitors are used
WO2019097753A1 (en) * 2017-11-15 2019-05-23 株式会社村田製作所 Film capacitor
WO2021024565A1 (en) * 2019-08-08 2021-02-11 株式会社村田製作所 Film capacitor
WO2021049380A1 (en) * 2019-09-13 2021-03-18 京セラ株式会社 Film capacitor element

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017014312A (en) * 2015-06-26 2017-01-19 京セラ株式会社 Dielectric film and metalized film, film capacitor and connection type capacitor using the same, and inverter and electric vehicle
WO2018190437A1 (en) * 2017-04-14 2018-10-18 京セラ株式会社 Film capacitor, connection-type capacitor, and inverter and electric vehicle in which said capacitors are used
WO2019097753A1 (en) * 2017-11-15 2019-05-23 株式会社村田製作所 Film capacitor
WO2021024565A1 (en) * 2019-08-08 2021-02-11 株式会社村田製作所 Film capacitor
WO2021049380A1 (en) * 2019-09-13 2021-03-18 京セラ株式会社 Film capacitor element

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